Why is my ex doing this?

look I am not going to read your long story by the way you are talking about her in in the first sentence you have no respect for her. So you leave her alone and ignore her. Stop answering her calls email and text. If you don't have respect for someone you shouldn't talk to them or be with them. Also avoid her! If she is near you get up and move go some were else and don't say a word to her.